The present invention describes a novel heavy-metal-free sequence leading to a superior, more economical, and scalable process for the high efficiency conversion of hexaallylhexaazaisowurtzitane to hexanitrohexaazaisowurtzitane. Each fuel rod includes a top end and a bottom end wherein the top end extends into the upper end fitting andor the bottom end extends into the lower end fitting. Each switch processes messages in the order in which they are received by the switch and each output switch follows the same rule as the other output switches. The systems and methods can provide a user the desired information pertaining to one or more tires of a vehicle that are to be monitored, and the respective locations of the tires.